- Table HH-3 to Subpart HH of Part 98—Landfill Gas Collection Efficiencies
Table HH-3 to Subpart HH of Part 98—Landfill Gas Collection Efficiencies
| Description | Term ID | Landfill gas collection
efficiency | A1: Area with no waste in-place | Not applicable; do not use this area in the calculation. | A2: Area without active gas collection, regardless of cover type | CE2 | 0%. | A3: Area with daily soil cover and active gas collection | CE3 | 50%. | A4: Area with an intermediate soil cover, or a final soil cover not meeting the criteria for A5 below, and active gas collection | CE4 | 65%. | A5: Area with a final soil cover of 3 feet or thicker of clay or final cover (as approved by the relevant agency) and/or geomembrane cover system and active gas collection | CE5 | 85%. | Area weighted average collection efficiency for landfills | CEave1 = (A2*CE2 + A3*CE3 + A4*CE4 + A5*CE5)/(A2 + A3 + A4 + A5). |
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